Note:* When using drip tips on atomizer, you must be very careful with the e-juice level inside. You can not neither drip too much nor too little, just several drops. Too much e-juice will lead to a high possibility of inhaling e-juice into your mouth, while too little will cause dry burning which will greatly shorten atomizer life.* This is not a problem when using cartomizers, because cartomizer can hold e-juice itself.